//NAV MOUSEOVERS
squareOn = new Image();  squareOn.src = "img/blue.gif";
squareOff = new Image(); squareOff.src = "img/yellow.gif";

function swapImg(imgName,imgSwap) {
 document["c" + imgName].src = eval(imgSwap + ".src");
 return true;
}

//DROP DOWNS
var show = new Array();
show[1]=0;
show[3]=0;
show[4]=0;
show[5]=0;
show[6]=0;
show[7]=0;

function preHide(menu) {
 show[menu]=0;
 setTimeout("hideMenu(" + menu + ");",400);
 return true;
}

function preShow(menu) {
 show[menu]=1;
 hideAll();
 swapImg(menu,'squareOn');
 showMenu(menu);
 return true;
}

function hideMenu(menu) {
 if (show[menu]==0) {
  swapImg(menu,'squareOff');
  document.getElementById('d'+menu).style.visibility = 'hidden';
 }
}

function showMenu(menu) {
 document.getElementById('d'+menu).style.visibility = 'visible';
}

function hideAll() {
 hideMenu(1);
 hideMenu(3);
 hideMenu(4);
 hideMenu(5);
 hideMenu(6);
 hideMenu(7);
}